All of us remember, remember with terrible feelings, what happened in January 1933. Hitler was made Chancellor of Germany. I think some of us suspected what is going to happen. I am remembering vividly a discussion of two of my friends, the physicist, Heitler and the more famous physicist, Pauli. It was in February 1933. Hitler has called for elections and there were fears what would happen. And what I heard in that discussion was- We have been both of us in Communist Russia. Dictatorship in Germany is something that just can't happen. We know what dictatorship is, it won't happen here. Those were, of course, critical days for all of us. I want to tell you what the first sign was that I saw of Hitler's dictatorship. On the advertising columns there had been advertisements about better knives or spoons, and equally advertisements about better and poorer candidates for the election. One day in February, all these advertisements disappeared and from then on, no advertisement was allowed unless it was approved by the government. I don't want to tell you the sad story of the burning of the Reichstag or the arrest of our communist representatives. Of Hitler taking over a government which had a majority only because the communists had been arrested. These are events which we all know.